关键词: 发动机喷管;喷管气流;流动分布;数值模拟

Abstract: n insteady compressible N-S equation set is solved with irviscous-viscous fractional method which splits the equations according to its physical process. In the irviscous-step, the Euler equations is solved with Efficient Euler Solver, and in the viscous-step the parabolic equation is solved with a whole implicit scheme. In order to remove both temporal and spatial inconsistencies resulted from the fractional, some efficent measure is taken. Simulated flow fields of inside and outside an axial symmetry nozzle are given by using irviscous-viscous fractional method.

Key words: Engine nozzle;Nozzle gas flow;Flow distribution;Numerical simulation